Rebecca buys some scarves that cost $5 each and 2 purses that cost $12 each. The cost of Rebecca's total purchase is $39. what equation can be used to find n, the number of scarves that Rebecca buys?

Answers

Answer 1

Answer: Let n represent the amount of scarves Rebecca buys, and p represent the number of purses Rebecca buys.

We know that scarves cost $5 each, and purses that cost $12 each. We also know that the cost of Rebecca's entire purchase is 39 dollars.

So,

5n + 2p = $39

However, we were also given that Rebecca buys a total of 2 purses, so we can plug that into the equation.

5n + 2(12) = 39

When simplified, we get:

5n +24 = 39

To simplify even further, we must subtract 24 from both sides of the equation.

5n = 15

Finally, we must divide both sides by the coefficient of the variable, or 5.

n = 3

Therefore, Rebecca buys 3 scarves.

However, this problem didn't ask you to solve the equation, therefore the correct answer in this situation is probably one of the ones we started out with, either

5n + 2(12) = 39

or

5n +24 = 39

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Are the ratios 3/5 and 9/15 proportional?How do you know?

Answers

Yes. 5*3=15 and 3*3=9. They are proportional because if you multiply the top and the bottom of the first fraction by the same number and you get the second number they are proportional.

A rectangle prism has a length of 8 feet , a width of 3 feet , and a height of 5 feet. What is the surface area of the rectangle prism?

Answers

Answer:

Surface area of the rectangular prism = $158\,feet^2$

Step-by-step explanation:

Surface area of a rectangular prism is:

$=2((Length* Width)+(Width* Height)+(Height* Length))$

For,

$Length=8\,feet\n\nWidth=3\,feet\n\nHeight=5\,feet$

Surface area of the rectangular prism for the given dimensions is :

$=2((8* 3)+(3* 5)+(5* 8))\n\n=2(24+15+40)\n\n=2(79)\n\n=158\,feet^2$

Surface area of the rectangular prism = $158\,feet^2$

Answer:

Answer is A = 158

Step-by-step explanation:

You can use the equation A = 2(wl + hl + hw)

Bennie swims 6 laps in 4 1/2 minutes what is the rate in minutes per laps

Answers

6/4.5 = 1 and 1/3 laps per minute

About 1.3 minutes per lap

a petting zoo has 5 lambs 11 rabbits 4 goats and 4 piglets. find the ratio of goats to the total number of animals. write the ratio in the simplest form then explain its meaning

Answers

5 over 19 is the number of goats to animals

N^2+7n+15=5
show work please

Answers

n^2+7n+15=5
n^2 + 7n + 10 = 0
(n + 5)(n + 2) = 0
n + 5 = 0
n = -5
n + 2 = 0
n = -2

Answer: n = -5 and -2

$n^2+7n+15=5$

$n^2+7n=-10$

$n^2+7n+((7)/(2))^2=-10+((7)/(2))^2$

$n^2+7n+(49)/(4)=-10+(49)/(4)$

$(n+(7)/(2))^2=(9)/(4)$

$n+(7)/(2)=\sqrt{(9)/(4)}$

$n=-(7)/(2)+\sqrt{(9)/(4)}$

$n=-2$
$n=-5$

0.45013 in scientific notation

Answers

When putting numbers into scientific notation, always put the decimal after the ones place. In this case, you would put the decimal after 4 and before 5 (in between). From there, you count how many decimal places you moved in order to change it into that form.

0.45013 would change to 4.5013 and you would have to multiply it by 10 to the negative power of 1 (you're only moving back one place).

4.5013 x 10^-1

Hope this helps :)

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Indicate which property is illustrated in Step 4.Step 1 (-9) + 9 + 5(7 + 3) = (-9) + 9 + (5 • 7) + (5 • 3) Step 2 = (-9) + 9 + (35) + (15) Step 3 = (-9) + 9 + 50 Step 4 = 0 + 50 Step 5 = 50 associative property of multiplicationcommutative property of divisioninverse property of multiplicationinverse property of addition